Pribttbr s erisket



UNITED sTnTEs PATENT oEEroE.

ANDREW OVEREND, OF PHILADELPHIA, PENNSYLVANIA.

PRIN TER S FRISKET.

Specification of Letters Patent No. 11,072, dated June 13, 1854.

of the city of Philadelphia and State oi Pennsylvania, have invented anew and use ful Improvement in the Construction ot Printers Friskets;and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, in which- Figure 1 is a view of the upper side of my improvedtrisket, and Fig. 2 a view of the opposite side of the same.

`Friskets are used by book and job print-- ers for the purpose ofpreventing the gin of the paper which surrounds each page of printedmatter from being stained or marked while the impression is being made.They are usually constructed of a metallic frame which is covered bylayers of paper pasted together orthick canvass or muslin. An impressionof the page or printed matter is then taken on this covering and theparts printed upon are cut out, thus leaving a frame work of thick paperor canvas to cover and protect the margins of the printed matter. Theprocess of preparing a frisket in this manner occupies from one t0 twohours and involves the expense of a fresh paper or muslin covering oneach occasion that the sizes of the pages or forms are changed.

My improvement consists in constructing the frisket of a wrought iron ormetallic frame notched along its outer sides like saw teeth and thenstretching longitudinally and transversely across the frame elasticstrips having at each end a clamp- These clamps are indented and can beslid along the sides of the frisket frame or they will remainpermanently in any position in which they may be placed. By this means Iform a movable barred frisket frame which can be altered or adjusted tovaried forms of pages in from 3 to 5 minutes without involving any lossof material. N

To enable others skilled in the art to make and use my improvement Iproceed to describe its construction and operation.

A B C D in Figs.` 1 and 2 `represent respectively the back and frontview of 1r frisket frame. It is usually made of wrought iron-is aboutone inch on the face and one eighth of an inch thick. The outer edge ofeach side of theframe is beveled down `on the front at an angle of about400 as shown in Fig. 2. On this beveled edge a series of saw teeth e e ee e are notched with a file as close together as ordinary saw teeth.These teeth are notched on the edges of each of the four sides of the:trisket frame as showninFigs. l and 2. The movable bars M, N, M, N',&c., and O, P, O', P', &c., are formed of india rubber webbing or othersimilar elastic material and are attached at each ex* tremity by rivetsor other convenient mode to the flat hooks or clamps H and I &c. H, I&c., and F and G &c. These flat hooks or clamps are made of sheet tin oriron and are bent over at their extremity so as to correspond with thebevels in the edges of the frisket frame. These hooks or clamps areslightly notched or indented at their outer extremity `as shown at K, K,K, K, Theses mall notches 7c lit into the indentations of the saw teethe e el and prevent the elastic bars slipping laterally. The elastic barsare made just long enough to extend from side to side when moderatelystretched. It they be stretched a little more then the bars and clampscan be slid or moved to any desired part of the. frame. The teeth e e ein each side of the frame are precisely opposite to corresponding teethon the opposite side of the frame. The movable elastic bars are madeofabout the width of the ordinary margin between the pages of a book orseveral sets of bars of various widths can be made for each frame andused as occasion may require. by stretching the bars O, P, O, P, &c.,longitudinally across the frame and hooking them at H, I, H, I, &c., andby stretching transversely the bars M, N, M, N',` &c., in the salmemanner a frisket can be quickly formed leaving the spaces L L L, Sac.,:tor the printed impression of any desired size-while at the same timethe elastic bars will etectually protect the marginal spaces on thepaper from being soiled.

Having thus described my improvement. what I claim as my invention anddesire to secure by Letters Patent is The construction of movable barredfrisket frames bythe combination of elastic bars clamps and toothedrisket frame ar-V ranged and operating as herein described.

. ANDW. OVEREND.

Witnesses:

CHARLES D. FREEMAN, I. C. SHAW.

